pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-97929-072_the_Gobby_O.ps) >>/Users/jc/w/tmp/Tune-97929-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1798/Bland_Weller/072_the_Gobby_O.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_97929.log 284334 Log file, useful mostly for debugging
Tune-97929-072_the_Gobby_O.abc 764 ABC music file with the extracted tune(s)
Tune-97929-072_the_Gobby_O.ps 33594 PostScript
Tune-97929-072_the_Gobby_O.txt 764 Plain-text file with the extracted tune(s)
Tune-97929-get.log 4676 Log file, useful mostly for debugging
These files should be available for 24 hours.